1 What is the term for the sequence of feeding relationships in an ecosystem? A Energy pyramid B Food chain C Biogeochemical cycle D Trophic cascade
4 What is a herbivore? A An animal that eats only plants B An animal that eats only animals C An animal that eats both plants and animals D An animal that breaks down dead matter
5 What is the term for animals that are eaten by other animals? A Predators B Prey C Decomposers D Producers
6 What is a trophic level? A The number of organisms in a habitat B The position of an organism in the food chain C The amount of energy in an ecosystem D The competition between species
8 Why are decomposers important in an ecosystem? A They produce food for all organisms B They recycle nutrients back into the soil C They provide oxygen for animals D They control the population of predators
9 What is the first organism in most food chains? A A consumer B A decomposer C A producer D A predator
10 Which organisms are called producers in a food chain? A Animals that eat plants B Plants that make their own food C Fungi that decompose matter D Animals that eat other animals
11 Which of the following is a primary consumer in an aquatic food chain? A Phytoplankton B Zooplankton C Fish D Shark
12 What is an omnivore? A An animal that eats only plants B An animal that eats only meat C An animal that eats both plants and animals D An animal that breaks down dead matter
15 In a grassland food chain, grass → grasshopper → frog → snake → hawk, which is the secondary consumer? A Grasshopper B Frog C Snake D Hawk
16 Which of the following shows a correct food chain? A Sun → Grass → Deer → Lion B Lion → Deer → Grass → Sun C Deer → Grass → Sun → Lion D Grass → Sun → Deer → Lion
17 What is the primary role of producers in a food web? A To decompose dead organisms B To convert sunlight into energy C To consume other organisms D To recycle nutrients
19 Which of the following is an example of a food web? A Grass → Rabbit → Fox B Grass → Rabbit → Fox; Grass → Mouse → Fox; Grass → Mouse → Snake → Hawk C Sun → Grass → Rabbit D Rabbit → Fox → Eagle
20 What is the role of an apex predator? A It is at the top of the food chain B It breaks down dead organisms C It produces food for other organisms D It consumes only producers
23 What is the role of decomposers in an ecosystem? A To produce oxygen B To break down dead matter C To hunt other animals D To make their own food
25 What is the term for organisms that get energy from eating other organisms? A Producers B Consumers C Decomposers D Autotrophs